COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

With the decrease in compression ratio, the volumetric efficiency

Does not change

Increases

Decreases

First decrease and then increase

TRUE ANSWER : ?
YOUR ANSWER : ?

The output of a gas turbine is 300 KW and its efficiency is 20 percent, the heat supplied is

6000 KW

15 KW

150 KW

600 KW

TRUE ANSWER : ?
YOUR ANSWER : ?

The capacity of a compressor is expressed in

m³/min

m³/kg

kg/m³

kg/m²

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum propulsion efficiency of a turbojet is attained at around following speed

1050 km/hr

2400 km/hr

1700 km/hr

550 km/hr

TRUE ANSWER : ?
YOUR ANSWER : ?

The hottest point in a gas turbine is

between ~ to i of the blade height

at the tip

at the base

in the center

TRUE ANSWER : ?
YOUR ANSWER : ?

Reheating in multistage expansion gas turbine results in

Maximum work output

Decrease of heat loss in exhaust

High thermal efficiency

Reduction in compressor work

TRUE ANSWER : ?
YOUR ANSWER : ?

Euler's equation is applicable for

Centrifugal compressor

Axial compressor

All of these

Pumps

TRUE ANSWER : ?
YOUR ANSWER : ?

Free air is the air at

20°C and 1 kg/cm² and relative humidity of 36%

0°C and standard atmospheric conditions

15°C and 1 kg/cm²

Atmospheric conditions at any specific location

TRUE ANSWER : ?
YOUR ANSWER : ?

The mean effective pressure of the compressor is the

None of these

Volume of air sucked by the compressor during its suction stroke

Actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions

Volume of air delivered by the compressor

TRUE ANSWER : ?
YOUR ANSWER : ?

For minimum work in multistage compression, assuming same index of compression in all stages

Work done in subsequent stages should increase

Work done in all stages should be equal

Work done in subsequent stages should decrease

Work done in first stage should be more

TRUE ANSWER : ?
YOUR ANSWER : ?